7640575065 has 24 divisors (see below), whose sum is σ = 13310905608. Its totient is φ = 4054283520.

The previous prime is 7640575021. The next prime is 7640575133. The reversal of 7640575065 is 5605750467.

7640575065 is a `hidden beast` number, since 76 + 4 + 0 + 575 + 0 + 6 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 687016521 + 6953558544 = 26211^2 + 83388^2 .

It is a de Polignac number, because none of the positive numbers 2^k-7640575065 is a prime.

It is a super-3 number, since 3×7640575065³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 7640575065.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 422076 + ... + 439805.

It is an arithmetic number, because the mean of its divisors is an integer number (554621067).

Almost surely, 2^7640575065 is an apocalyptic number.

It is an amenable number.

7640575065 is a deficient number, since it is larger than the sum of its proper divisors (5670330543).

7640575065 is a wasteful number, since it uses less digits than its factorization.

7640575065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862089 (or 862086 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 45.

The square root of 7640575065 is about 87410.3830502990. The cubic root of 7640575065 is about 1969.5878156257.

The spelling of 7640575065 in words is "seven billion, six hundred forty million, five hundred seventy-five thousand, sixty-five".